Flight Unlimited II is a 1997 flight simulator video game developed by Looking Glass Studios and published by Eidos Interactive. The player controls one of five planes in the airspace of the San Francisco Bay Area, which is shared with up to 600 artificially intelligent aircraft directed by real-time air traffic control. The game eschews the aerobatics focus of its predecessor, Flight Unlimited, in favor of general civilian aviation. As such, new physics code and an engine were developed, the former because the programmer of Flight Unlimited's computational fluid dynamics system, Seamus Blackley, had left the company.